This is a simple life hack but a useful one. One of the most annoying things with dealing with tape (duct tape, electrical tape, etc.) is locating the end of the roll. Often it can be tightly bound into the tape making it hard to find and when you do find it often the tape tears trying to wrestle the tape end off of the roll. To make it easy to find simply add a paper clip to the end of the roll.

Once the paper clip is added it is very easy to find the end of the roll of tape. Note that the roll may dry out / lose its stickiness where the roll contacts the paper clip, but this is a small price to pay for being able to easily find the end of the roll.

The video below describes this in a little more detail: